Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances

Wei Xiong, Debabrata Sikdar, Lim Wei Yap, Malin Premaratne, Xinyong Li, Wenlong Cheng

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.
Original languageEnglish
Pages (from-to)3445 - 3452
Number of pages8
JournalNanoscale
Volume7
Issue number8
DOIs
Publication statusPublished - 2015

Cite this

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title = "Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances",
abstract = "We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.",
author = "Wei Xiong and Debabrata Sikdar and Yap, {Lim Wei} and Malin Premaratne and Xinyong Li and Wenlong Cheng",
year = "2015",
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Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances. / Xiong, Wei; Sikdar, Debabrata; Yap, Lim Wei; Premaratne, Malin; Li, Xinyong; Cheng, Wenlong.

In: Nanoscale, Vol. 7, No. 8, 2015, p. 3445 - 3452.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances

AU - Xiong, Wei

AU - Sikdar, Debabrata

AU - Yap, Lim Wei

AU - Premaratne, Malin

AU - Li, Xinyong

AU - Cheng, Wenlong

PY - 2015

Y1 - 2015

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AB - We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from 440 to 1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of hot spots to maximize the overall enhancement of surface enhanced Raman scattering.

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